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package org.glassfish.security.services.common;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.glassfish.hk2.api.Descriptor;
import org.glassfish.hk2.api.Filter;

public class SecurityAccessFilter implements Filter {

    private static final String SYS_PROP_JAVA_SEC_POLICY = "java.security.policy";
    private static final Logger LOG = SecurityAccessValidationService._theLog;

    private static boolean javaPolicySet =
        AccessController.doPrivileged(new PrivilegedAction<Boolean>() {

            @Override
            public Boolean run() {
                Boolean rtn = Boolean.FALSE;
                
                String wlsName = System.getProperty(SYS_PROP_JAVA_SEC_POLICY);
                
                if ( wlsName != null && !wlsName.isEmpty() )
                        rtn = Boolean.TRUE;
                
                return rtn;
            }
        });
    
    
    @Override
    public boolean matches(Descriptor d) {

        if (LOG.isLoggable(Level.FINE)) {
            LOG.fine("Descripter: " + d );
        }

        if (!javaPolicySet) {
            if (LOG.isLoggable(Level.FINE)) {
                LOG.fine("java security policy is not set, so no validation for security servies.");
            }

            return false;
        }
        
        if (d == null)
            return false;

        Set<String> qualifiers = d.getQualifiers();
        if (qualifiers != null && qualifiers.size() != 0) {
            for (String s : qualifiers) {
                if (Secure.class.getCanonicalName().equals(s)) {
                    if (LOG.isLoggable(Level.FINE)) {
                        LOG.fine("The instance is annotated with \'Secure\': " + s);                                
                    }
                    return true;
                }
            }
        }

        if (LOG.isLoggable(Level.FINE)) {
            LOG.fine("The instance has no \'Secure\' annotated ");
        }

        return false;
    }

}
